Carboxyl (COOH) — FTIR absorption peaks and assignments
These are the characteristic FTIR wavenumbers where Carboxyl (COOH) tends to absorb, compiled from published literature and ranked by supporting evidence. Each assignment is traceable to a source (DOI) and cross-validated against our 130,000+ reference spectra and knowledge graph.
Backed by 8 cited sources
Characteristic FTIR peaks for Carboxyl (COOH)
| Wavenumber (cm⁻¹) | Supporting facts | Cited sources | Top confidence |
|---|---|---|---|
| 1400 | 11 | 10 | 1.0 |
| 1700 | 10 | 9 | 1.0 |
| 1740 | 10 | 9 | 1.0 |
| 1710 | 9 | 7 | 0.95 |
| 1720 | 8 | 7 | 0.9 |
| 1600 | 7 | 6 | 1.0 |
| 1410 | 7 | 5 | 0.9 |
| 1745 | 6 | 6 | 1.0 |
| 1725 | 6 | 6 | 0.9 |
| 1705 | 6 | 5 | 0.9 |
| 1550 | 6 | 5 | 0.9 |
| 1430 | 6 | 4 | 1.0 |
| 1630 | 5 | 5 | 0.9 |
| 1715 | 5 | 4 | 0.95 |
| 1500 | 5 | 3 | 0.9 |
| 1540 | 4 | 4 | 1.0 |
| 1384 | 4 | 4 | 0.9 |
| 1650 | 4 | 4 | 0.9 |
| 1620 | 4 | 4 | 0.9 |
| 1590 | 4 | 3 | 1.0 |
| 1721 | 4 | 3 | 1.0 |
| 1735 | 4 | 3 | 1.0 |
| 1415 | 4 | 3 | 0.9 |
| 1651 | 4 | 3 | 0.9 |
| 1717 | 3 | 3 | 1.0 |
| 1636 | 3 | 3 | 0.95 |
| 1640 | 3 | 3 | 0.95 |
| 1535 | 3 | 3 | 0.95 |
| 1750 | 3 | 3 | 0.95 |
| 1608 | 3 | 3 | 0.9 |
Showing the 30 best-supported peaks of 313 total for Carboxyl (COOH).
Literature behind these assignments
-
945 cm⁻¹ confidence 1.0
“CdO cm-1, the band in the ester group at 1751 that of 1700 cm-1 CdO cm-1 On the other hand, the Acesulfame-K band at 945 does due to the stretch in carboxylic acids, and the band CdO cm-1 not overlap with any Aspartame band, but the low sig”
Armenta 等 - 2004 - FTIR determination of aspartame and acesulfame-k i DOI: 10.1021/jf049218l -
1554 cm⁻¹ confidence 1.0
“While in cobalt stearate, the absorption peak at wave number of 1554 cm-1indicate the presence of asymmetric vibrations of carboxylate groups absorption peak at the wave numbers of 3000”
Asriza 和 Arcana - 2015 - SYNTHESIS OF COBALT STEARATE AS OXIDANT ADDITIVE F DOI: 10.1063/1.4930711 -
2775 cm⁻¹ confidence 1.0
“Peak at 2775 cm-1 representing COOH groups with H-bonded OH-stretching.”
Bawa 等 - 2013 - A novel stimuli-synchronized alloy-treated matrix DOI: 10.1016/j.jconrel.2012.12.011 -
1717 cm⁻¹ confidence 1.0
“Explicitly associated in text: 'peak at 1717 cm-1 corresponds to carboxyl groups'”
Daud 等 - 2017 - Functionalizing Graphene Oxide with Alkylamine by DOI: 10.3390/nano7060135 -
1409 cm⁻¹ confidence 1.0
“Explicitly stated as -OH of -COOH group bending.”
Ha 和 West - 2002 - Studies on the photodegradation of polarized UV-ex DOI: 10.1002/app.11315 -
1744 cm⁻¹ confidence 1.0
“Adsorption of -COOH group peak”
Handayani 等 - 2018 - Synthesis and Characterization of Chitosan-p-t-But DOI: 10.1088/1757-899X/333/1/012011 -
1723 cm⁻¹ confidence 1.0
“Explicit assignment in text: 'peaks at 1723.23 and 1666.12 assigned to COO- and NH groups'”
Mahmud 等 - 2010 - Kinetic Analysis of Oleic Acid Esterification Usin DOI: 10.1021/ie900704n -
1659 cm⁻¹ confidence 1.0
“Explicit assignment: 'COO- absorptions, at 1659 ... which corresponded to of uronic acids'”
Trigui 等 - 2018 - Physicochemical properties of water-soluble polysa DOI: 10.1016/j.ijbiomac.2018.05.202
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